R&S FSW-K7, User Manual

Page: 99 / 407

Configuration
R&S
®
FSW-K7
99 User Manual 1173.9240.02 ─ 23
Note: Since the external trigger uses a second channel on the oscilloscope, the maxi-
mum memory size, and thus record length, available for the input channel 1 is reduced
by half. For details, see the oscilloscope's data sheet and documentation.
Remote command:
TRIG:SOUR EXT
, see
TRIGger[:SEQuence]:SOURce
on page 262
I/Q Power ← Trigger Source
This trigger source is not available if the optional Digital Baseband Interface or optional
Analog Baseband Interface is used for input. It is also not available for analysis band-
widths
≥
160 MHz.
Triggers the measurement when the magnitude of the sampled I/Q data exceeds the
trigger threshold.
The trigger bandwidth corresponds to the resolution bandwidth setting for data acquisi-
tion (see
"Resolution Bandwidth" on page 107).
Remote command:
TRIG:SOUR IQP
, see
TRIGger[:SEQuence]:SOURce
on page 262
IF Power ← Trigger Source
The R&S FSW starts capturing data as soon as the trigger level is exceeded around
the third intermediate frequency.
For frequency sweeps, the third IF represents the start frequency. The trigger band-
width at the third IF depends on the RBW and sweep type.
For measurements on a fixed frequency (e.g. zero span or I/Q measurements), the
third IF represents the center frequency.
This trigger source is only available for RF input.
It is not available for input from the optional Digital Baseband Interface or the optional
Analog Baseband Interface.
The available trigger levels depend on the RF attenuation and preamplification. A refer-
ence level offset, if defined, is also considered.
When using the optional 2 GHz bandwidth extension (R&S FSW-B2000) with an IF
power trigger, the IF power trigger corresponds to a "width" trigger on the oscilloscope,
with a negative polarity and the range "longer". Thus, data acquisition starts when both
of the following conditions apply to the signal fed into the CH1 input connector on the
oscilloscope:
●
The power level has remained below the specified trigger level for a duration lon-
ger than the drop-out time.
●
The power level then rises above the specified trigger level.
For details, see "Basics on the 2 GHz Bandwidth Extension" in the R&S FSW I/Q Ana-
lyzer and I/Q Input User Manual.
For details on available trigger levels and trigger bandwidths, see the data sheet.
Remote command:
TRIG:SOUR IFP
, see
TRIGger[:SEQuence]:SOURce
on page 262
Baseband Power ← Trigger Source
Defines triggering on the baseband power (for baseband input via the optional Digital
Baseband Interface or the optional Analog Baseband interface).
Trigger Configuration